Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7be4b41a78a9ff27d064bc15072c81c703a2f94d3b987eaba95e343672aec1ba' 
  AND token = 'UAdYXaUo9HkfHALxH3sRrcK38fU0jLqILURXQXvgnek=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}